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Finding the Fourth Proportional to 8,673.40, 12,998.10 and 6,921.40

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Solution

The fourth proportional to 8,673.40, 12,998.10 and 6,921.40 is: 10,372.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,673.40 : 12,998.10 = 6,921.40 : x
  2. Step 2: Convert to fraction form
    8,673.40/12,998.10 = 6,921.40/x
  3. Step 3: Cross multiply
    8,673.40x = 12,998.10 × 6,921.40
  4. Step 4: Simplify right side
    8,673.40x = 89,965,049.34
  5. Step 5: Solve for x
    x = 89,965,049.34/8,673.40
  6. Step 6: Final answer
    x = 10,372.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.